During a press conference, Gudmundson reviewed key portions of the case file. He said then-FBI special agent Alan Garber interviewed Hart twice.

Duane Hart

Kandiyohi County

"Here's a critical question," Gudmundson said. "What happened to this information? Based on the reading of the file, it's not apparent that any follow up was done on this information."

Hart claimed to know Danny Heinrich. Gudmundson said Hart told investigators he'd been inside Heinrich's apartment, where he observed a black ninja suit and saw two police scanners, including one that was gray in color. Hart also said Heinrich showed him a dark blue pistol.

Those are all details that matched suspect descriptions in the investigation.

Gudmundson said in the review of the case file, Hart recalled a conversation with Heinrich in October 1989.

"Heinrich asks Hart how to get rid of a body, asking if putting a body down a well or in a river would be the best way," Gudmundson said. "Hart tells him a body down a well will stink and that a body down the river will float."

Gudmundson said this information came to light during Hart's first interview with the task force in March 1991. But seven months later, investigators interviewed Hart again.